Operation: Kathleen is the untold true World War II story of the secret Irish alliance of the IRA with Nazi Germany to invade Northern Ireland and take back the country from the British.

In an uncertain time in history, where control over ones life is unclear, a small harbor town in the South of Ireland becomes the focus of national police as a county clerk makes one wrong move that will not only spiral down his own life, but the lives of everyone around him.

As he joins a division of the IRA which is about to make a deal with Nazi Germany, he realizes too late who his real friends are and what this alliance can cost him. Leaving now is no option or everyone he loves will die.